Well i upgraded to 5.0.0.822 and i noticed that call volume was a lil low and saw other ppl had that problem so i decided to downgrade to 5.0.0.688. Sounds simple enough i have done plenty of downgrades and upgrades but nowi have a very big problem where my phone is now inoperable. it did not do the downgrade all the way and now it turns off and on and says reload software: 507 but when i try to load the OS again it wont get past loading the modules and the phone just turns off mid way through loading the modules. i need help how can i fix this

err 507 means all your data is gone, so i hope you have a recent backup.

not sure why your software keeps having problems with installation, but here is what you can do to help / fix it:

1) uninstall all the software packages you have on there now
2) re download (and maekke sure its complete / uncorrupted) the OS package
3) install said package
4)launch loader.exe from the commandline with the /nojvm argument